TERMINALS OF ECU
CHECK MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU) AND INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY
*A |
Main Body ECU (Multiplex Network Body ECU) with 1 Connector |
- |
- |
*A |
Main Body ECU (Multiplex Network Body ECU) with 2 Connectors |
- |
- |
(a) Disconnect the main body ECU (multiplex network body ECU) connectors.
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(b) Measure the resistance and voltage according to the value(s) in the table below.
HINT:
Measure the values on the wire harness side with the connector disconnected.
Terminal No. (Symbol) |
Wiring Color |
Terminal Description |
Condition |
Specified Condition |
---|---|---|---|---|
MB-31 (BECU) - Body ground |
- |
Battery power supply |
Always |
11 to 14 V |
MB-32 (IG) - Body ground |
- |
Ignition power supply (IG signal) |
Ignition switch ON → off |
11 to 14 V → Below 1 V |
MB-30 (ACC) - Body ground |
- |
Ignition power supply (ACC signal) |
Ignition switch ACC → off |
11 to 14 V → Below 1 V |
MB-11 (GND1) - Body ground |
- |
Ground |
Always |
Below 1 Ω |
MB-18 (DBKL) - Body ground |
- |
Driver seat belt buckle switch signal |
Driver seat belt fastened |
10 kΩ or higher |
Driver seat belt unfastened |
Below 1 Ω |
|||
MB-2 (RCTY) - Body ground |
- |
Rear door courtesy light switch RH input |
Rear door LH closed (OFF) |
10 kΩ or higher |
Rear door LH open (ON) |
Below 1 Ω |
|||
MB-13 (LCTY) - Body ground |
- |
Rear door courtesy light switch LH input |
Rear door RH closed (OFF) |
10 kΩ or higher |
Rear door RH open (ON) |
Below 1 Ω |
CHECK COMBINATION METER ASSEMBLY
(a) Disconnect the F4 combination meter assembly connector.
(b) Measure the resistance and voltage according to the value(s) in the table below.
HINT:
Measure the values on the wire harness side with the connector disconnected.
Terminal No. (Symbol) |
Wiring Color |
Terminal Description |
Condition |
Specified Condition |
---|---|---|---|---|
F4-40 (B) - Body ground |
SB - Body ground |
Battery power supply |
Always |
11 to 14 V |
F4-39 (IG+) - Body ground |
P - Body ground |
IG power supply |
Ignition switch ON → off |
11 to 14 V → Below 1 V |
F4-21 (ET) - Body ground |
W- B - Body ground |
Ground |
Always |
Below 1 Ω |
F4-7 (PKBI) - Body ground |
GR - Body ground |
Front passenger seat belt buckle switch signal |
Ignition switch ON, front passenger side seat belt fastened and front passenger seat occupied |
10 kΩ or higher |
Ignition switch ON, front passenger side seat belt unfastened and front passenger seat occupied |
Below 1 Ω |
Toyota CH-R Service Manual > Smart Key System(for Start Function): ACC Monitor Malfunction (B2274)
DESCRIPTION
This DTC is stored when a malfunction in the ACC output circuit is detected.
The ACC output circuit is the circuit between terminal ACCD of the certification
ECU (smart key ECU assembly) and the ACC relay.
DTC No.
Detection Item
DTC Detection Condit ...
Toyota CH-R Service Manual > 3zr-fae Coolant: Components
COMPONENTS
ILLUSTRATION
*1
RESERVE TANK CAP
*2
RADIATOR DRAIN COCK PLUG
*3
NO. 1 ENGINE UNDER COVER
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N*m (kgf*cm, ft.*lbf): Specified torque
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